Malicious PDF — malware analysis report

Static analysis result for SHA-256 db7789c9e540c063…

MALICIOUS

PDF

84.0 KB Created: 2021-03-29 16:40:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fcf80d5fd23f8d13f79bc47126a43d5b SHA-1: d487598d8ba3b5e83a4af09e43c8a09e81f6ee70 SHA-256: db7789c9e540c063c3751da62f623f9cc973405ed7f3e996f996a4869f4fabf0
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by multiple heuristics as a link farm, containing numerous external URIs. The ML classifier and ClamAV also identified it as malicious, with ClamAV specifically labeling it as a phishing trojan. The document body appears to be obfuscated or corrupted, but the presence of many external links suggests an attempt to redirect users to potentially harmful content or for SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gimoguvi.ru/wix?keyword=do+hard+things+alex+and+brett+harris+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415929/normal_602b35514b92f.pdfIn PDF document text
    • http://rofogukiluvupu.mygamesonline.org/kufinigokeruzovibe.pdfIn PDF document text
    • https://cdn.sqhk.co/zanemulazif/jbiGslI/3106222168.pdfIn PDF document text
    • http://luxasireku.sportsontheweb.net/rangkuman_biologi_sma.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413362/normal_604aae47cdf85.pdfIn PDF document text
    • https://disipewadapa.weebly.com/uploads/1/3/4/8/134870645/javanopemifoku.pdfIn PDF document text
    • http://jojazinex.mygamesonline.org/ctet_syllabus_2020_december.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383136/normal_602a4f4ee51ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471481/normal_6020ff4f7800b.pdfIn PDF document text
    • https://cdn.sqhk.co/nisisepolo/jf2hhig/word_wars_documentary_download.pdfIn PDF document text
    • http://pakawuwujawo.getenjoyment.net/47215552094.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469103/normal_5fdbcb5b9c519.pdfIn PDF document text
    • http://mukinumatonewo.getenjoyment.net/wufefubokujozobadosodixo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495387/normal_605a5f38d2d55.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374703/normal_5ff853435a408.pdfIn PDF document text
    • https://mutomutozuso.weebly.com/uploads/1/3/0/8/130814133/7680627.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486987/normal_5fed42256d9e7.pdfIn PDF document text
    • https://cdn.sqhk.co/dubikewe/ajfhhXU/nautical_life_ring_decor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455376/normal_5fe170a9df392.pdfIn PDF document text
    • https://cdn.sqhk.co/xexanodu/ghJCghp/bike_racing_helmet_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/vefapatape/1jbigzN/chocolaterie_stam_omaha.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464865/normal_605f615bc5b67.pdfIn PDF document text
    • https://memabalizova.weebly.com/uploads/1/3/4/4/134490842/punatovanupibuzaseji.pdfIn PDF document text
    • https://fafogefefotal.weebly.com/uploads/1/3/5/3/135314601/kememitarorov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/444a00b7-c277-430a-bdbe-a6d9ca91e2b3/34458218037.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbb08334-5661-4653-952b-dcd06418a21f/viraberokawaz.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fafe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFE 5296 bytes
SHA-256: d7d9882ffd6f69d70185e72bdeae026b56b776322706d18ba75e02de16091353
font_01_sfnt_off00010d00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D00 11284 bytes
SHA-256: b294206f60acac63aacd94af1bf9dcb8a2a46803b1c8543c4952ff08d5dc0699
font_02_sfnt_off000133a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133A0 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176